The chassis is mainly based on tubes technology and all fitted on a monocarrier with power supply directly derived / rectified by mains.
The UHF tuner is transistor based,
VHF Tuner selector has at least one tube.
Note the SPECTACULAR POSITIONED EHT selenium rectifier,
which is a Specially designed selenium rectifiers were once widely used as EHT rectifiers in television sets and photocopiers. A layer of selenium was applied to a sheet of soft iron foil, and thousands of tiny discs (typically 2mm diameter) were punched out of this and assembled as "stacks" inside ceramic tubes. Rectifiers capable of supplying tens of thousands of volts could be made this way. Their internal resistance was extremely high, but most EHT applications only required a few hundred microamps at most, so this was not normally an issue. With the development of inexpensive high voltage silicon rectifiers, this technology has fallen into disuse.
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